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Dual linear ultrasound controlDual linear ultrasound control description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20080114387, Dual linear ultrasound control. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001]1. Field of the Invention [0002]The present invention is related to ophthalmic surgical control systems having foot controllers and, more particularly, to foot controllers having foot pedals with movement in both pitch and yaw. [0003]2. Description of Related Art [0004]The use of foot controllers in ophthalmic surgical systems is well known. The foot controllers typically have a foot pedal that pivots about an axis. As the pedal is depressed the foot controller causes a change in some operating function such as ultrasound, irrigation and aspiration, vitrectomy cutter, coagulation, or some other function. The movement or travel in pitch, i.e. up and down, of the pedal is typically divided into one or more regions. For example a total pitch movement of the pedal may be 15.degree. with three regions contained within the 15.degree. of movement. Continuing with the three region example, each region then forms some portion of the total 15.degree. of movement. For example region 1 may be 5% of the pitch movement, region 2 may be 30%, and region 3 50% or more. There is typically some detent that provides tactile feedback to a user as the pedal moves from one region to the next. [0005]In addition to pitch movement, some foot controllers provide movement in yas, i.e. side-to-side movement. These foot controllers are referred to as dual linear foot controllers. One such dual linear foot controller is described in U.S. Pat. No. 6,179,829 and assigned to the same assignee as the present invention and is hereby incorporated in its entirety by reference. The movement in yaw provides another direction of travel for a surgeon to controller further functions of surgery. The yaw movement is typically divided between left and right movements. [0006]Such movement in pitch and yaw provides for effective control of surgical functions but some functions have multiple parameters that need to be adjusted during surgery. For example in controlling ultrasound during phacoemulsification in cataract surgery the function of ultrasound control includes such parameters as power, pulse rate, duty cycle, pulse duration, pulse interval, and minimum/maximum duty cycle switching. Prior art systems did not allow the foot controller to independently control more that one of these parameters at a time. Typically when the foot controller traveled from one region to the next the surgical system would force a parameter to a set value or a set change in value as the parameter of the current region was controlled. This was also true of dual linear foot controllers. If a surgeon wanted to change a parameter other than the one currently programmed to the foot controller, the parameter would have to be changed at the surgical console. This could lead to unwanted delay in the surgery. [0007]Therefore, a need exists to allow independent control of two parameters of the same function to provide for more surgeon control and improve efficiency. BRIEF DESCRIPTION OF THE DRAWINGS [0008]FIG. 1 is a view of a surgical control system in accordance with the present invention; and [0009]FIG. 2 is a perspective view of a portion of FIG. 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT [0010]FIG. 1 shows an ophthalmic surgical control system 10 in accordance with the present invention. System 10 includes a surgical console 12 with a display 14 and control modules (not shown) within body 16. The system 10 is also connected to a foot controller 18 for movement of a pedal by a user over a pre-determined range in pitch and yaw. Foot controller 18 may be connected to the console 12 by a cable or wirelessly as indicated by lines 20. Surgical console 12 controls a variety of surgical instruments. The system 10 allows the foot controller 18 to independently control two parameters for a single function where a first parameter is controlled by movement of the pedal in pitch and a second parameter is controlled by movement of the pedal in yaw. [0011]The foot controller 18, best seen in FIG. 2, typically has four buttons 22 and a center foot pedal 24, which has two axes of movement, to control two linear functions simultaneously or two parameters of a single function independently. The pedal 24 operates in both pitch (up and down travel indicated at 26) and yaw (side to side travel indicated at 28). The yaw movement simulates the side switches used on some systems, and can be set and programmed for left-foot or right-foot users. Reflux (if selected) is always activated by inward yaw displacement of pedal 24. The pedal 24 may be programmed to operate two linear functions simultaneously (Dual Linear control). The control of linear functions is proportional to the amount of pedal travel. In single linear mode, pitch controls the linear functions selected, and yaw provides mode, pitch controls the liner functions selected, and yaw movements provides on/off control in both directions. [0012]The pedal 24, located in the center of the foot control, provides two axes of movement and thus allows simultaneous independent control of two system parameters. Both pedal movements are programmable with respect to function and control parameters. In the pitch direction, pedal 24 provides approximately 15.degree. of up/down movement. In the yaw direction, pedal provides approximately 10.degree. of travel from center in both the left and right directions, however, the center (home) position may be offset approximately 5.degree. in either direction. When released, pedal 24 returns to the home (up or center) position. The foot controller 18 includes programmable detents (not shown) that provide tactile feedback to the pitch movement when it moves between different regions. [0013]The following are examples of foot controller 18 configurations>Single Region Pitch Control (one detent position) [0014]The pitch movement is programmed to provide linear control as a function of relative pedal 24 displacement (e.g. 0.degree. to 15.degree. down corresponds to 0% to 100% output). An example of single region pitch control is the linear coagulation function. Two Region Pitch Control [0015]There are two programmable regions (two detent positions). When programmed for linear control, the pitch movement is a function of relative pedal 2 displacement in region 2 (e.g., 5.degree. to 15.degree. down corresponds to 0% to 100% output). An example is irrigation/aspiration (I/A) control, where region 1 is for irrigation and region 2 is for linear vacuum or flow. Three Region Pitch Control [0016]There are three programmable regions (three detent positions). When programmed for linear control, pitch movement is a function of relative pedal 24 displacement as shown below. An example is single linear ultrasound phases, where region 1 is irrigation, region 2 is linear aspiration, and region 3 is linear power. Programmable Yaw Positions [0017]The foot controller 18 may be set and programmed to give greater linear yaw movement for either right or left foot operation. Single Linear Setup Continue reading about Dual linear ultrasound control... Full patent description for Dual linear ultrasound control Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Dual linear ultrasound control patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Dual linear ultrasound control or other areas of interest. ### Previous Patent Application: Method of providing corneal tissue and method of determining the bioburden of laboratory providing same Next Patent Application: Surgical tool system with a powred handpiece and a console, the console able to provide energization signals to the handpiece in either a motor drive mode or a direct drive mode Industry Class: Surgery ### FreshPatents.com Support Thank you for viewing the Dual linear ultrasound control patent info. IP-related news and info Results in 0.09744 seconds Other interesting Feshpatents.com categories: Qualcomm , Schering-Plough , Schlumberger , Seagate , Siemens , Texas Instruments , 174 |
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